package com.lwc.vhr.config;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.lwc.vhr.model.Hr;
import com.lwc.vhr.model.RespBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.authentication.*;
import org.springframework.security.config.annotation.ObjectPostProcessor;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.builders.WebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import com.lwc.vhr.service.HrService;
import org.springframework.security.web.AuthenticationEntryPoint;
import org.springframework.security.web.access.intercept.FilterSecurityInterceptor;
import org.springframework.security.web.authentication.AuthenticationFailureHandler;
import org.springframework.security.web.authentication.AuthenticationSuccessHandler;
import org.springframework.security.web.authentication.logout.LogoutSuccessHandler;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;

@Configuration
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    HrService hrService;
    @Autowired
    CustomFilterInvocationSecurityMetadataSource customFilterInvocationSecurityMetadataSource;
    @Autowired
    CustomUrlDecisiionManager customUrlDecisiionManager;

    //密码加密
    @Bean
    PasswordEncoder passwordEncoder(){
        return new BCryptPasswordEncoder();
    }

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception{
        auth.userDetailsService(hrService);
    }

    public void configure(WebSecurity web) throws Exception{
        web.ignoring().antMatchers("/login");
    }

    //身份认证
    @Override
    protected void configure(HttpSecurity http)throws Exception{

        http.authorizeRequests()
//                .anyRequest().authenticated()//所有请求认证后才可以访问
                .withObjectPostProcessor(new ObjectPostProcessor<FilterSecurityInterceptor>() {
                    @Override
                    public <O extends FilterSecurityInterceptor> O postProcess(O object) {
                        object.setAccessDecisionManager(customUrlDecisiionManager);
                        object.setSecurityMetadataSource(customFilterInvocationSecurityMetadataSource);
                        return object;
                    }
                })
                .and()
                .formLogin()//表单登录
                .usernameParameter("username")
                .passwordParameter("password")
                .loginProcessingUrl("/doLogin")
                .loginPage("/login")
                .successHandler(new AuthenticationSuccessHandler() {//登录成功回调
                    @Override
                    public void onAuthenticationSuccess(HttpServletRequest req, HttpServletResponse resp, Authentication authentication) throws IOException, ServletException {

                        resp.setContentType("application/json;charset=utf-8");//返回json
                        PrintWriter out = resp.getWriter();
                        Hr hr = (Hr) authentication.getPrincipal();
                        hr.setPassword(null);
                        RespBean ok = RespBean.ok("登陆成功!",hr);
                        String s = new ObjectMapper().writeValueAsString(ok);
                        out.write(s);
                        out.flush();
                        out.close();

                    }
                })
                .failureHandler(new AuthenticationFailureHandler() {//登录失败回调
                    @Override
                    public void onAuthenticationFailure(HttpServletRequest req, HttpServletResponse resp, AuthenticationException exception) throws IOException, ServletException {

                        resp.setContentType("application/json;charset=utf-8");//成功则返回json
                        PrintWriter out = resp.getWriter();
                        RespBean respBean = RespBean.error("登陆失败!");
                        if (exception instanceof LockedException){

                            respBean.setMsg("账户被锁定，请联系管理员！");
                        }else if (exception instanceof CredentialsExpiredException){
                            respBean.setMsg("密码已过期，请联系管理员！");
                        }else if (exception instanceof AccountExpiredException){
                            respBean.setMsg("账户已过期，请联系管理员！");
                        }else if (exception instanceof DisabledException){
                            respBean.setMsg("账户已禁用，请联系管理员！");
                        }else if (exception instanceof BadCredentialsException){
                            respBean.setMsg("用户名或密码错误，请重新输入！");

                        }
                        out.write(new ObjectMapper().writeValueAsString(respBean));
                        out.flush();
                        out.close();
                    }
                })
                .permitAll()//所有相关的接口可以直接返回
                .and()
                .logout()//注销
                .logoutSuccessHandler(new LogoutSuccessHandler() {
                    @Override
                    public void onLogoutSuccess(HttpServletRequest req, HttpServletResponse resp, Authentication authentication) throws IOException, ServletException {

                        resp.setContentType("application/json;charset=utf-8");//成功则返回json
                        PrintWriter out = resp.getWriter();
                        out.write(new ObjectMapper().writeValueAsString(RespBean.ok("注销成功！")));
                        out.flush();
                        out.close();

                    }
                })
                .permitAll()
                .and()
                .csrf().disable().exceptionHandling().
                //没有认证时，在这里处理结果，不要重定向
                authenticationEntryPoint(new AuthenticationEntryPoint() {
            @Override
            public void commence(HttpServletRequest req, HttpServletResponse resp, AuthenticationException authException) throws IOException, ServletException {
                resp.setContentType("application/json;charset=utf-8");//成功则返回json
                resp.setStatus(401);
                PrintWriter out = resp.getWriter();
                RespBean respBean = RespBean.error("访问失败!");
                if (authException instanceof InsufficientAuthenticationException){

                    respBean.setMsg("请求失败，请联系管理员！");
                }
                out.write(new ObjectMapper().writeValueAsString(respBean));
                out.flush();
                out.close();
            }
        });



    }


}
